package day03;

public class IfElseDemo {
    public static void main(String[] args) {
        double price = 100.0;
        if (price >= 500) {
            price *= 0.8;

        } else {
            price *= 0.9;
        }
        System.out.println(price);

        double score = 999;
        if (score>=0&&score<=100){
            System.out.println(score+"为合法成绩");
        }else{
            System.out.println(score+"为不合法成绩");

        }




    }
}
